1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7414641e9bd47b96d25863a841639969f090d18a8537e2e1cf9e42ac2a08ed71. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e93c4d2a-f3ed-4913-acf8-9557146507b5.json and https://artists.proofprofile.net/proofs/artist/e93c4d2a-f3ed-4913-acf8-9557146507b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c028391b4a766b5e891f6f39888af6da092aba4e6ddca1b67b10d6c3476cbd1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA1H2461929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf4a214e67774ec1ca44cfc93b890f716a201bf5287f5a41b715d3ce52faa4b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AEA2L2354225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61df546c323b20fe1ec5b5c13d9a781fcd0dc0b65fb05fda7a0d485e41ea59ca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6TI2365962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5730f3a805d4dcc1c8f65fe139b724475c3cf68839815c5b93cdc322c41feb58. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6TI2333451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de721694d158f17c6bf0d80dd04a44949ede3bce1aa2ff228d8aaaf8765895a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2361692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9159b9704de87f0bce928bf7d98025ec1ab70da92fa2e28f6e17289ec81c59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6QE2399742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b2922c8767e73f7ba51e5f93a0d708f0362473cc685719b80d20d2097b1b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6TI2357947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ddf716c1a4c0e48984d2b2bea688e2025e970d1cf5757d0faa8c5ee58297f9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2355971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766a02823ade8e740ea8fcd93412f9574f9b55251c1d11e841c95cfc5cb805c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2333431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dc1e11fbba86bfeb33b63002fba00a9afaa477ba24dd31b0b1387c005bbc7d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6XY2338953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ec4e8c0fa37db115f3f650256092c588e0fe12b6876e786a70283a81fd0381. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6TI2355365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999f0e3159be500b0585b2bc5d997c30aa4e7a9ac8d5731677571b6c44ddcc3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2394261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636461b14a91e2b5eeec158892c21c4625a875dfb9442c6c0cf67ca462fb715. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2389671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815131b93b83ddf1ca6c040d3ed778f40c153ff4f17ca29ed1860c0c7fc9aa26. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6XW2314528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fdd88f1781625c9e5a820db5af312aaadc2383dcfed4615d5351ac70a0e47e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6XW2319874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5892f28992736f4d919272184c3d927bad1bccf91e37a474ee1d74146f87903d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2324767.